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Miners underground at a copper mine in NSW, Australia

Underground development mining: A portal to unlocking hidden resources

By wpengine on July 23, 2025
Tech Talk
underground development | underground mining

By Andrew Clark Underground development is a critical aspect of modern mining operations, allowing for the access and extraction of valuable resources buried deep beneath the Earth’s surface.   Unlike open-pit mining, which involves removing large volumes of overlying rock, underground mining targets ore bodies that are too deep or otherwise unsuitable for surface extraction.  The process begins with development mining, where drill rigs create drifts or declines to access the ore geometries. These tunnels form the “roads” through which miners, equipment, and materials travel.   Watch a video guide to underground development below. Development mining is typically performed before actual ore…

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